Thin dual-aperture zoom digital camera
A dual-aperture zoom camera comprising a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, the Wide and Tele cameras mounted directly on a single printed circuit board, wherein the Wide and Tele lenses have respective effective focal lengths EFL W and EFL T and respective total track lengths TTL W and TTL T and wherein TTL W /EFL W >1.1 and TTL T /EFL T <1.0. Optionally, the dual-aperture zoom camera may further comprise an optical OIS controller configured to provide a compensation lens movement according to a user-defined zoom factor (ZF) and a camera tilt (CT) through LMV=CT*EFL ZF , where EFL ZF is a zoom-factor dependent effective focal length.
1. A camera system, comprising:
a) a Wide camera that includes a Wide lens with an effective focal length EFL W and a total track length TTL W ; and
b) a Tele camera that includes a Tele lens with five lens elements along a Tele lens optical axis and with an effective focal length EFL T , a total track length TTL T and a F number smaller than 3.2,
wherein the five lens elements include, in order from an object side to an image side, a first lens element L 1 with positive refractive power and a focal length f 1 , a second lens element L 2 with negative refractive power, a third lens element L 3 , a fourth lens element L 4 , and a fifth lens element L 5 , wherein f 1 is smaller than TTL T /2, wherein the camera system is a dual-aperture zoom camera embedded in a mobile device,
wherein a ratio e=EFLT/EFLw is in the range 1 . 3 - 2 . 0 ,
wherein TTL W /EFL W >1.1,
wherein TTL T /EFL T <1.0,
wherein EFL T is in the range 5-12 mm,
and wherein a height difference between the Tele and Wide cameras is equal to or smaller than 1.65 mm.
2. The camera system of claim 1 , wherein TTL T /EFL T <0.9.
3. The camera system of claim 1 , wherein a ratio TTL T /TTL W is smaller than 0.8 e.
4. The camera system of claim 1 , wherein a height of the camera system has a value between 4 mm and 8 mm.
5. The camera system of claim 1 , wherein the F number is substantially equal to 2.8.
6. The camera system of claim 1 , wherein the fourth and fifth lens elements have opposite refractive power signs.
7. The camera system of claim 1 , wherein the third lens element has negative refractive power.
8. The camera system of claim 1 , wherein the fourth lens element and the fifth lens element have different dispersions.
9. The camera system of claim 1 , wherein a ratio TTL T /TTL W is in the range 1.0-1.25.
10. The camera system of claim 1 , wherein the mobile device is a smartphone or a tablet.
11. The camera system of claim 2 , wherein the mobile device is a smartphone or a tablet.
12. The camera system of claim 3 , wherein the mobile device is a smartphone or a tablet.
13. The camera system of claim 4 , wherein the mobile device is a smartphone or a tablet.
14. The camera system of claim 5 , wherein the mobile device is a smartphone or a tablet.
15. The camera system of claim 6 , wherein the mobile device is a smartphone or a tablet.
16. The camera system of claim 7 , wherein the mobile device is a smartphone or a tablet.
17. The camera system of claim 8 , wherein the mobile device is a smartphone or a tablet.
18. The camera system of claim 9 , wherein the mobile device is a smartphone or a tablet.